code: def test_equals(self):
      psidx1 = ps.Index([1, 2, 3, 4])
      psidx2 = ps.Index([1, 2, 3, 4])
  
      with self.assertRaisesRegex(
          ValueError, "Cannot combine the series or dataframe"
      ):
          psidx1.equals(psidx2)
  
imports: import pandas
  import numpy
  from pyspark import pandas
  from pyspark.pandas.config import set_option, reset_option
  from pyspark.testing.pandasutils import PandasOnSparkTestCase
  from pyspark.testing.sqlutils import SQLTestUtils
label_desc: Use image node_id 17 for calling the DiffFramesErrorMixin obj's underlying member method code with example usage: obj.test_equals() without return types